If you are running Microsoft Windows 98 or later, at least some updates should be available for your computer.
Windows Vista, Windows 7, Windows 8, Windows 8.1 Whenever you are prompted to reboot the computer, reboot the computer.
This is an important step and in some cases may be required several times before you have installed all the Windows updates available.
If you work in a corporate environment, this can happen all the time with custom software applications using proprietary formats.
Even if you are a home user, it might be worth your time to change the default icon that is assigned for a text document or for all PDF documents, etc.
If you have already ran an update and are have a problem not documented try uninstalling the updates through the Add/Remove Programs or Programs and Features in the Control Panel.
Below are recommendations for helping to prevent problems.
After the computer has rebooted, make sure to visit the Windows update page again to make sure all the files you need are downloaded.
Users of Microsoft Windows XP and later versions can have Microsoft Windows automatically update their computer.
This tip is really just for customizing the look and feel of Windows to your liking.